Method of producing negative electrode, negative electrode, and non-aqueous electrolyte secondary battery

A negative electrode for a non-aqueous electrolyte secondary battery, the negative electrode comprising at least:

• a negative electrode current collector;
• and
• a negative electrode composite material,
• the negative electrode composite material being disposed on a surface of the negative electrode current collector,
• the negative electrode composite material including at least a first silicon oxide material, a second silicon oxide material, carboxymethylcellulose, and styrene-butadiene rubber,
• the first silicon oxide material not having been pre-doped with lithium,
• the second silicon oxide material having been pre-doped with lithium,
• a thermogravimetric curve attributed to the negative electrode composite material satisfying a relation expressed by the following expression (I):
• w2/(w1+w2)≥0.9 (I)
• where w1 denotes a weight decrement on the thermogravimetric curve across a range of 180° C. to 230° C. and w2 denotes a weight decrement on the thermogravimetric curve across a range of 250° C. to 300° C.